On 2018-06-02 00:14, Steven D'Aprano wrote:
> Since /wibble doesn't exist, neither does /wibble/a\0b
>
>
> py> os.path.exists("/wibble")
> False
> py> os.path.exists("/wibble/a\0b")
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "/storage/torrents/torrents/python/Python-3.6.4/Lib/
> genericpath.py", line 19, in exists
> os.stat(path)
> ValueError: embedded null byte
>
> Oops.
Existence is a sketchy sort of thing. For example, sometimes the OS
hides certain directory entries from some syscalls while allowing
visibility from others. The following comes as on the FreeBSD system
I have at hand:
>>> import os
>>> '.bashrc' in os.listdir() # yes, it sees hidden dot-files
True
>>> '.zfs' in os.listdir() # but the OS hides .zfs/ from listings
False
>>> os.path.exists('.zfs') # yet it exists and can cd into it
True
>>> os.chdir('.zfs') # and you can chdir into it
>>> os.listdir() # but you can't listdir in it
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OSError: [Errno 22] Invalid argument
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